Results

Definition of tetragon : 1. A plane figure having four sides and angles; a quadrangle, as a square, a rhombus, etc.
2. An aspect of two planets with regard to the earth when they are distant from each other ninety degrees, or the fourth of a circle.

Synonyms:

quad

dodecahedron, parallelogram, parallelepiped, pentahedron, octagon, right-angle triangle, hexahedron, polygon, pentagon, quadrilateral, square, hexagon, trapezoid, rhombus, cube, quadrangle, equilateral triangle, triangle, rectangle, heptagon, dodecagon, cusp, scalene triangle, tetragram, polyhedron, tetrahedron, isosceles triangle, decagon, octahedron

Usage examples:

• Thus we speak of a pentagon but not of a tetragon or a trigon, although both words are correct in form. - "The Teaching of Geometry", David Eugene Smith.